Function futures_util::stream::futures_unordered

pub fn futures_unordered<I>(futures: I) -> FuturesUnordered<I::Item> where
    I: IntoIterator,
    I::Item: Future, 

Converts a list of futures into a Stream of outputs from the futures.

This function will take a list of futures (e.g. a Vec, an Iterator, etc), and return a stream. The stream will yield items as they become available on the futures internally, in the order that they become available. This function is similar to buffer_unordered in that it may return items in a different order than in the list specified.

Note that the returned set can also be used to dynamically push more futures into the set as they become available.